1 Correction to: MAPAN-Journal of Metrology Society of India (March 2021) 36(1):1–32 https://doi.org/10.1007/s12647-021-00442-4

Page 6, caption of Fig. 2 may be read as:

“The Gazette notifications of Legal Metrology (National Standards) Rules, 2011 about CSIR-NPL as keeper of the measurement standards and Ministry of Environment, Forest and Climate Change notifying CSIR-NPL as National verification agency for emission and ambient air monitoring instruments”.